works on 64-bit cpu but fails on 32-bit

wtf.cs

using System;
using System.Threading.Tasks;

class MainClass {
  public static void Main (string[] args)
  {
    for (int i = 0; i < 10000; i++)
    {
      long value = 0;
      
      var t1 = Task.Run(() =>
      {
          for (int j = 0; j < 100; j++)
          {
            value = 0x111111111;
          }
      });
  
      var t2 = Task.Run(() =>
      {
          for (int j = 0; j < 100; j++)
          {
            value = 0x000000000;
          }
      });
      
      Task.WaitAll(t1, t2);
      
      if (value != 0x000000000 && value != 0x111111111)
      {
        throw new Exception("WTF?!");
      }
      else
      {
        Console.WriteLine(value);
      }
    }
  }
}